US4162278A - Flame retardant polyphenylene ether resin compositions containing a pentaerythrityl phosphonate - Google Patents
Flame retardant polyphenylene ether resin compositions containing a pentaerythrityl phosphonate Download PDFInfo
- Publication number
- US4162278A US4162278A US05/900,827 US90082778A US4162278A US 4162278 A US4162278 A US 4162278A US 90082778 A US90082778 A US 90082778A US 4162278 A US4162278 A US 4162278A
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- US
- United States
- Prior art keywords
- composition
- pentaerythrityl
- polyphenylene ether
- phosphonate
- flame retardant
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/49—Phosphorus-containing compounds
- C08K5/51—Phosphorus bound to oxygen
- C08K5/53—Phosphorus bound to oxygen bound to oxygen and to carbon only
- C08K5/5317—Phosphonic compounds, e.g. R—P(:O)(OR')2
- C08K5/5333—Esters of phosphonic acids
- C08K5/5357—Esters of phosphonic acids cyclic
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L25/00—Compositions of, homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Compositions of derivatives of such polymers
- C08L25/02—Homopolymers or copolymers of hydrocarbons
- C08L25/04—Homopolymers or copolymers of styrene
- C08L25/06—Polystyrene
Definitions
- Example 1 The procedure of Example 1 was repeated while using 4 and 8% respectively of the designated pentaerythrityl phosphonate.
- Table III demonstrate that when only 4% of the phosphonate compounds are included, no flame retardancy occurred, whereas at 8% all of the samples were either V-0 or V-1.
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
Polyphenylene ether resin/rubber-modified, high-impact polystyrene thermoplastic compositions as rendered flame retardant by use of specific pentaerythrityl phosphonate compounds.
Description
The present invention relates to flame retardant polyphenylene ether resin compositions containing a pentaerythrityl phosphonate flame retardant compound. More particularly, it relates to flame retardant rubber-modified polyphenylene ether thermoplastic resin compositions containing a pentaerythrityl phosphonate compound of the formula: ##STR1## wherein R is selected from methyl, phenyl, benzyl, mono-, di- and trimethylbenzyl.
The compounds represented by the above formula are known. Friedman, U.S. Pat. No. 3,141,032, discloses compounds wherein R is alkyl of 1-18 carbon atoms, preferably 8 or more carbon atoms, as flame retardants for polyolefins and cellulose acetate.
German Offenleg No. 2,630,693 discloses compounds wherein R is alkyl (1-10 carbon atoms), cycloalkyl (5-7 carbon atoms), haloalkyl (1-3 carbon atoms), alkenyl (2-10 carbon atoms), phenyl or halogen-substituted phenyl; phenylalkyl (7-9 carbon atoms) or phenylalkenyl (8-10 carbon atoms), either of which may be substituted on the phenyl ring with a halogen atom. The compounds are disclosed as flame retardants for aromatic polyesters (e.g., polyethylene terephthalate).
Neither Friedman nor the German application suggests the use of the compounds as flame retardants for polyphenylene ether resins. The preferred compounds of Friedman (i.e., at least 8 carbon atoms) are not effective for flame retarding polyphenylene ether resins. While certain of the compounds of the German application, notably the phenyl and benzyl, are useful flame retardants for polyphenylene ether resins, others are not. Thus, there is no suggestion in either reference that the specific compounds of the present invention would be useful as flame retardants for polyphenylene ether resins, and the present invention would not be predictable in view of these disclosures.
The present invention provides flame retardant rubber-modified polyphenylene ether resin compositions by incorporating therein an effective flame retardant amount of a pentaerythrityl phosphonate of the formula; ##STR2## wherein R is selected from methyl, phenyl, benzyl, mono-, di- or trimethylbenzyl.
The compounds may be prepared by known procedures. The methyl and phenyl derivatives may be prepared by reacting, respectively, methylphosphonic dichloride and phenylphosphonic dichloride with pentaerythritol in methylene chloride or dioxane solvent at about 50° C., or in the absence of a solvent.
The compounds in general may be prepared via an Arbuzov-type rearrangement, in the presence or absence of a solvent, e.g., dioxane, by reacting an appropriate active-halogen compound, e.g., benzyl chloride (bromide) with a suitable dialkyl pentaerythrityl diphosphite, e.g., diethylpentaerythrityl diphosphite: ##STR3##
The polyphenylene ether resins useful herein may be prepared as described in U.S. Pat. No. 4,024,093, incorporated herein by reference. In particular, the polyphenylene ether resins for which the compounds of the present invention are useful are rubber-modified polyphenylene ether resins comprising 10 to 90 parts by weight of polyphenylene ether, preferably 20-50 parts by weight, and 90-10 parts by weight, preferably 50-80 parts by weight, of a styrene polymer. The styrene polymer is a rubber-modified, high-impact polystyrene. The resins are blends of the two polymers, which are mutually soluble, to form a homogeneous polymer composition.
The flame retardant pentaerythrityl phosphonate compound is used in the blended polyphenylene ether resin in an amount sufficient to provide a self-extinguishing composition as defined below. In general, the compound is effectively used in an amount of from about 5 to 20 percent by weight, preferably 6 to 10 percent by weight.
The flame retardant compound may be added to the polymer by any known method, such as by milling on a two-roll plastic mill or in a Banbury mixer; by dry-blending with the polymer and extruding, and the like.
It is also within the scope of the invention to incorporate such ingredients as plasticizers, dyes, pigments, heat and light stabilizers, antioxidants, antistatic agents, photochromic materials, and the like, into the polymer composition.
The following examples further illustrate the invention.
A total of 10 grams of a blend of polyphenylene ether/rubber-modified impact polystyrene (Noryl Type 731-General Electric Co.), containing 6 percent by weight of the pentaerythrityl phosphonate compound described in Table I, prepared by dry blending, was extruded through a Melt Index Apparatus (described in ASTM D-1238) at 290°-300° C. The cylindrical extrudate, 3-5 inches long and 0.25 inch diameter, was subjected to the following flammability test procedure described in Underwriters Laboratories Test UL94, Vertical Test Method 3.10-3.15 (September, 1973): The cylindrical polymer sample, clamped in a vertical position, is ignited with a 3/4 inch blue flame (methane or natural gas) for 10 seconds, and the flame is withdrawn. If the flame is extinguished within 25 seconds, it is ignited again for 10 seconds and the flame again withdrawn. The flame extinguishment time is again recorded. If the flame extinguishment time does not exceed 5 seconds for either flame application, the sample is rated V-0; if the flame extinguishment time for either the first or second flame application is between 5 and 25 seconds, it is rated V-1. If a sample shows extinguishment times greater than 25 seconds for either flame application, it is rated free burning (FB) and is considered to have failed the test.
TABLE I ______________________________________ Flammability Test Results Sample R Flammability Rating* ______________________________________ A CH.sub.3 V-0; V-0 ##STR4## V-1; V-1 C ##STR5## V-1; V-1 D ##STR6## V-1; V-0 E ##STR7## V-1; V-1 F ##STR8## V-1; V-1 G ##STR9## FB; FB H ##STR10## V-1; FB I CH.sub.2 CHCH.sub.2 FB; FB ______________________________________ *two separate determinations
Dimethyl pentaerythrityl diphosphonate (A) was evaluated as described in Example 1 versus didecyl pentaerythrityl diphosphonate (J) and dioctadecyl pentaerythrityl diphosphonate (K), compounds described in Example 6 and Example 1, respectively, of Friedman, U.S. Pat. No. 3,141,032. Results are shown in Table II.
TABLE II ______________________________________ Total Time to Flame Sample Flammability Rating Extinguishment* ______________________________________ A V-0 16 seconds J V-1 55 seconds K FB Failed ______________________________________ *three specimens, two flame applications for each sample
The pentaerythrityl phosphonates shown below were evaluated according to the procedure of Example 1 except that they were incorporated into rubber-modified, high-impact polystyrene at a level of 8 percent by weight. None of the compounds passed the flammability test. The compounds evaluated are:
1. Dibenzyl pentaerythrityl diphosphonate*
2. Di(p-chlorobenzyl)pentaerythrityl diphosphonate
3. Di(p-bromobenzyl)pentaerythrityl diphosphonate
4. Diphenyl pentaerythrityl diphosphonate*
5. Dimethyl pentaerythrityl diphosphonate*
6. Didecyl pentaerythrityl diphosphonate
7. Dioctadecyl pentaerythrityl diphosphonate
The procedure of Example 1 was repeated while using 4 and 8% respectively of the designated pentaerythrityl phosphonate. The results, as shown in Table III, demonstrate that when only 4% of the phosphonate compounds are included, no flame retardancy occurred, whereas at 8% all of the samples were either V-0 or V-1.
TABLE III ______________________________________ Flammability Flammability R Rating at 4% Rating at 8% ______________________________________ Methyl FB; V-1 V-0; V-0 Phenyl FB; FB V-1; V-1 Benzyl FB; FB V-1; V-1 4-Methylbenzyl FB; FB V-0 2,4-Dimethylben- FB; FB V-0; V-0 zyl 2,4,6-Trimethyl- FB; FB V-1; V-1 benzyl ______________________________________
Claims (9)
1. A flame retardant polyphenylene ether resin/rubber-modified, high-impact polystyrene thermoplastic composition comprising an effective flame retarding amount of a pentaerythrityl phosphonate compound represented by the formula: ##STR11## wherein R is methyl, phenyl, benzyl, or mono-, di- or trimethylbenzyl.
2. The composition of claim 1 wherein said molding composition comprises a homogeneous blend of 20 to 50 percent polyphenylene ether resin and 50 to 80 percent of rubber-modified, high-impact polystyrene resin.
3. The composition of claim 1 wherein each R is methyl.
4. The composition of claim 1 wherein each R is phenyl.
5. The composition of claim 1 wherein each R is benzyl.
6. The composition of claim 1 wherein each R is 4-methylbenzyl.
7. The composition of claim 1 wherein each R is 2,4-dimethylbenzyl.
8. The composition of claim 1 wherein R is 2,4,6-trimethylbenzyl.
9. The composition of claim 1 wherein the phosphonate is present in at least about 5% by weight of the composition.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US05/900,827 US4162278A (en) | 1978-04-28 | 1978-04-28 | Flame retardant polyphenylene ether resin compositions containing a pentaerythrityl phosphonate |
JP4985379A JPS54143460A (en) | 1978-04-28 | 1979-04-24 | Flameeretardant polyphenylene ether rubberrmodified impacttresistant polystyrene thermoplastic composition |
DE19792916972 DE2916972A1 (en) | 1978-04-28 | 1979-04-26 | MOLDING COMPOUND WITH FLAME PROTECTION EQUIPMENT |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US05/900,827 US4162278A (en) | 1978-04-28 | 1978-04-28 | Flame retardant polyphenylene ether resin compositions containing a pentaerythrityl phosphonate |
Publications (1)
Publication Number | Publication Date |
---|---|
US4162278A true US4162278A (en) | 1979-07-24 |
Family
ID=25413137
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US05/900,827 Expired - Lifetime US4162278A (en) | 1978-04-28 | 1978-04-28 | Flame retardant polyphenylene ether resin compositions containing a pentaerythrityl phosphonate |
Country Status (3)
Country | Link |
---|---|
US (1) | US4162278A (en) |
JP (1) | JPS54143460A (en) |
DE (1) | DE2916972A1 (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4255324A (en) * | 1979-10-18 | 1981-03-10 | American Cyanamid Company | Synergistic flame retardant compositions for polyphenylene ether resins |
US4588764A (en) * | 1984-08-16 | 1986-05-13 | General Electric Company | Compositions of polyphenylene ether resin and diphosphites |
EP0227101A2 (en) * | 1985-12-24 | 1987-07-01 | Ge Specialty Chemicals, Inc. | Spirodiphosphate - containing working substances |
US4720514A (en) * | 1985-03-11 | 1988-01-19 | Phillips Petroleum Company | Pigment concentrates for resins |
WO2000017268A1 (en) * | 1998-09-18 | 2000-03-30 | Albemarle Corporation | Halogen-free flame retardant thermoplastic polymer compositions |
WO2001057134A1 (en) * | 2000-02-04 | 2001-08-09 | Teijin Chemicals, Ltd. | Flame-retardant resin composition and molded article obtained therefrom |
WO2005056671A1 (en) * | 2003-12-10 | 2005-06-23 | Teijin Chemicals Ltd. | Flame-retardant styrene resin composition and molded article obtained therefrom |
US20060258816A1 (en) * | 2003-03-28 | 2006-11-16 | Shigeru Endo | Flame-retardant styrenic resin composition |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4321187A (en) * | 1980-07-03 | 1982-03-23 | American Cyanamid Company | Phosphinic acid flame retardants for polyphenylene ether resins |
JP5394813B2 (en) * | 2009-04-28 | 2014-01-22 | 帝人株式会社 | Flame retardant resin composition and molded product therefrom |
JP5571399B2 (en) * | 2010-01-27 | 2014-08-13 | 帝人株式会社 | Flame-retardant styrenic resin composition and molded product therefrom |
JP5502819B2 (en) * | 2011-08-24 | 2014-05-28 | 帝人株式会社 | Flame retardant resin composition and molded product therefrom |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3141032A (en) * | 1963-01-23 | 1964-07-14 | Union Carbide Corp | Dialkyl pentaerythritol diphosphonates and phosphite phosphonates |
US3976725A (en) * | 1971-09-24 | 1976-08-24 | General Electric Company | High impact strength thermoplastic compositions |
US3992482A (en) * | 1970-06-23 | 1976-11-16 | Stauffer Chemical Company | Fire retardant thermoplastic polymer compositions |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1422208A (en) * | 1972-08-23 | 1976-01-21 | Gen Electric | Polyphenylene ether compositions apparatus for continuous hydrogenation |
JPS5137936B2 (en) * | 1973-04-18 | 1976-10-19 | ||
AU8671075A (en) * | 1974-12-06 | 1977-05-26 | Gen Electric | Flame retardant, non-dripping composition of polyphenylene ether and acrylonitrile - butadiene-styrene |
US4154721A (en) * | 1976-09-21 | 1979-05-15 | Borg-Warner Corporation | Flame-retardant phosphonate compositions |
-
1978
- 1978-04-28 US US05/900,827 patent/US4162278A/en not_active Expired - Lifetime
-
1979
- 1979-04-24 JP JP4985379A patent/JPS54143460A/en active Pending
- 1979-04-26 DE DE19792916972 patent/DE2916972A1/en not_active Withdrawn
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3141032A (en) * | 1963-01-23 | 1964-07-14 | Union Carbide Corp | Dialkyl pentaerythritol diphosphonates and phosphite phosphonates |
US3992482A (en) * | 1970-06-23 | 1976-11-16 | Stauffer Chemical Company | Fire retardant thermoplastic polymer compositions |
US3976725A (en) * | 1971-09-24 | 1976-08-24 | General Electric Company | High impact strength thermoplastic compositions |
Cited By (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4255324A (en) * | 1979-10-18 | 1981-03-10 | American Cyanamid Company | Synergistic flame retardant compositions for polyphenylene ether resins |
US4588764A (en) * | 1984-08-16 | 1986-05-13 | General Electric Company | Compositions of polyphenylene ether resin and diphosphites |
US4720514A (en) * | 1985-03-11 | 1988-01-19 | Phillips Petroleum Company | Pigment concentrates for resins |
EP0227101A2 (en) * | 1985-12-24 | 1987-07-01 | Ge Specialty Chemicals, Inc. | Spirodiphosphate - containing working substances |
EP0227101A3 (en) * | 1985-12-24 | 1988-01-27 | Borg-Warner Chemicals Inc. | Spirodiphosphate - containing working substances |
WO2000017268A1 (en) * | 1998-09-18 | 2000-03-30 | Albemarle Corporation | Halogen-free flame retardant thermoplastic polymer compositions |
WO2001057134A1 (en) * | 2000-02-04 | 2001-08-09 | Teijin Chemicals, Ltd. | Flame-retardant resin composition and molded article obtained therefrom |
EP1262519A1 (en) * | 2000-02-04 | 2002-12-04 | Teijin Chemicals, Ltd. | Flame-retardant resin composition and molded article obtained therefrom |
US20040132876A1 (en) * | 2000-02-04 | 2004-07-08 | Katsuhiro Yamanaka | Flame-resistant resin composition and article molded therefrom |
EP1262519A4 (en) * | 2000-02-04 | 2005-04-27 | Teijin Chemicals Ltd | Flame-retardant resin composition and molded article obtained therefrom |
US7169837B2 (en) | 2000-02-04 | 2007-01-30 | Teijin Chemicals, Ltd. | Flame-resistant resin composition and article molded therefrom |
CN100360600C (en) * | 2000-02-04 | 2008-01-09 | 帝人化成株式会社 | Flame-retardant resin composition and molded artide obtained therefrom |
US20060258816A1 (en) * | 2003-03-28 | 2006-11-16 | Shigeru Endo | Flame-retardant styrenic resin composition |
WO2005056671A1 (en) * | 2003-12-10 | 2005-06-23 | Teijin Chemicals Ltd. | Flame-retardant styrene resin composition and molded article obtained therefrom |
US20070112108A1 (en) * | 2003-12-10 | 2007-05-17 | Katsuhiro Yamanaka | Flame-retardant styrene type resin composition and molded product therefrom |
Also Published As
Publication number | Publication date |
---|---|
JPS54143460A (en) | 1979-11-08 |
DE2916972A1 (en) | 1979-11-08 |
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Legal Events
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STCF | Information on status: patent grant |
Free format text: PATENTED CASE |
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DE | Dedication filed |
Free format text: 831214 |
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DI | Adverse decision in interference |
Effective date: 19840626 |